Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings

doi:10.1016/j.ceramint.2019.01.059

CORC > 金属研究所 > 中国科学院金属研究所

	Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings
	Guo, Lei 1,2; Yan, Zheng 1; Wang, Xiaohui 3; He, Quanjun 1
刊名	CERAMICS INTERNATIONAL
	2019-04-15
卷号	45 期号:6 页码:7627-7634
关键词	Thermal barrier coatings (TBCs) Calcium-magnesium-alumina-silicate (CMAS) MAX phases Ti2AlC Protective layers
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2019.01.059
通讯作者	Guo, Lei(glei028@tju.edu.cn)
英文摘要	To protect thermal barrier coatings (TBCs) from calcium-magnesium-alumina-silicate (CMAS) attack, depositing a protective layer has been a promising approach. In this study, a MAX phase compound, Ti2AlC, is found to highly resist to CMAS attack, which could be a candidate material for the protective layer. The interaction between Ti2AlC pellets and molten CMAS at 1250 degrees C for 0.5 h, 2 h and 8 h was investigated. Exposed to CMAS melt for 0.5 h, a dense Al2O3 film formed on the surface, accompanied by Al and Ti migrating to the melt. The accumulation of Al and Ti in CMAS triggered its crystallization, forming anorthite and melilite phases. The Al2O3 film and the crystallization of the melt significantly suppressed the CMAS penetration. The film and crystals grew with the heat time. By comparison, some pre-oxidized Ti2AlC pellets were also exposed to CMAS attack at 1250 degrees C. The CMAS on the pre-oxidized pellets only precipitated CaAl2Si2O8 anorthite crystals, which exhibited much lower sizes than those in the non-oxidized samples. Also, the pre-oxidized pellets were highly resistant to CMAS penetration.
资助项目	National Natural Science Foundation of China[51501127] ; Natural Science Foundation of Tianjin[16JCQNJC02900] ; Natural Science Foundation of Tianjin[16JCYBJC18700]
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000460492200130
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Tianjin
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/132268]
专题	金属研究所_中国科学院金属研究所
通讯作者	Guo, Lei
作者单位	1.Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China 2.Minist Educ, Tianjin Key Lab Adv Joining Technol, Key Lab Adv Ceram & Machining Technol, Tianjin 300072, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Guo, Lei,Yan, Zheng,Wang, Xiaohui,et al. Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings[J]. CERAMICS INTERNATIONAL,2019,45(6):7627-7634.
APA	Guo, Lei,Yan, Zheng,Wang, Xiaohui,&He, Quanjun.(2019).Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings.CERAMICS INTERNATIONAL,45(6),7627-7634.
MLA	Guo, Lei,et al."Ti2AlC MAX phase for resistance against CMAS attack to thermal barrier coatings".CERAMICS INTERNATIONAL 45.6(2019):7627-7634.